show that rapists will go for women who are wearing dresses/skirts as opposed to pants, as its easier to manipulate the situation.

So technically, it hasn't got to do with being dressed provocatively, but more to do with how quickly the rapists can do his deed. Dress/Skirt up, easier to hold a victim down with one hand and try to remove knickers with the other, than using both hands to remove pants/jeans (especially tight ones) cause that involved using both hands so nothing left to control the victim.

BTW, to the person who asked for stat about rapes of women in Abhayas. Its been discussed numerous times on this forum, that due to most rapes going unreported in Abhaya wearing countries, a true figure isn't going to come to light, but I can tell you, its probably way more than you might think.